Electronics Forum | Wed Oct 24 13:27:13 EDT 2007 | hussman
Ah, see Steve, I was right. It depends Marcin. If you use the same temps in each zone for all your product, vary you converyor speed. This will negate any waiting time between profiles. Slowing the speed will decrease your Delta-T to an acceptabl
Electronics Forum | Wed Oct 24 12:18:33 EDT 2007 | mpolak
I was asking about delta t in profiling, because I have just started to learn how to do it and wanted to know about it. So how can you reduce delta t, so you dont go from cold to hot too fats. Is it enough to slow donw conveyor speed??? Thanks M
Electronics Forum | Thu Oct 25 11:29:04 EDT 2007 | ck_the_flip
Forget all the bickering and semantics. EVERYONE IS RIGHT!! ...but then again, in soldering, there IS no right, wrong, or indifferent... just blame. :-) Soldering is, after all, the most difficult process with the most opportunities for defects.
Electronics Forum | Fri Oct 26 09:38:57 EDT 2007 | slthomas
Rather than go into detail here, try googling "classic reflow profiling". One of the guys at ECD (a thermal profiler manufacturer) wrote a pretty decent article that covers most if not all of it. You DO have a profiler, don't you, or an oven with
Electronics Forum | Thu Oct 25 13:53:35 EDT 2007 | mpolak
Thanks for all your answers. Could you guys tell me how you profile new job. I mean if you could how do you begin setting up profile for brand new job and so on. It would be very usefull for me. Thanks MArcin
Electronics Forum | Wed Oct 24 10:48:47 EDT 2007 | slthomas
Actually I didn't see anything saying this person was an engineer, but I digress.... In this case this person may very well be referring to the delta t across space rather than over time, as in different locations on a pcb that's being profiled.
Electronics Forum | Wed May 19 07:38:42 EDT 2004 | Bob L.
I'm trying to help one of our remote sites solve a problem with a warped PBGA. The corners are lifted, creating columnar joints and the central balls are sometimes shorting. I've verified that it's not popcorning and I've got samples going to the l
Electronics Forum | Wed May 16 18:09:15 EDT 2007 | johnwnz
It always surprises me how many variations there are for profiling and controlling your ovens, and the thing is most of them are fairly valid. Here's yet another option: Your board profile needs to be specific, 2 boards can look identical but have ve
Electronics Forum | Sat May 18 21:52:30 EDT 2013 | kumar_antom
Hi guys, Whats actually Delta T ? As i know,its applicable for reflow profiling. Recently my superior asked me whats the Delta T for heating settings on my reflow ? Does Delta T applicable for heater setting on my reflow ? Pls advise as i m puzzl
Electronics Forum | Tue May 09 17:56:36 EDT 2006 | russ
When we first started we had this problem, we eliminated by longer profile (less delta T) and then ultimately chnaged pad dimensioning for 0402 away from IPC standard. i would highly recommend that you check your placement accuracy and your prof
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